bump ethereum_serde_utils #15500

Job	Run time
check-code	9m 58s
check-msrv	4m 19s
beacon-chain-tests	18m 46s
cargo-udeps	6m 21s
cli-check	17m 28s
compile-with-beta-compiler	13m 50s
debug-tests-ubuntu	15m 46s
dockerfile-ubuntu	13m 44s
doppelganger-protection-test	24m 13s
ef-tests-ubuntu	14m 7s
eth1-simulator-ubuntu	29m 11s
execution-engine-integration-ubuntu	15m 16s
merge-transition-ubuntu	29m 26s
network-tests	17m 20s
no-eth1-simulator-ubuntu	27m 30s
op-pool-tests	21m 1s
release-tests-ubuntu	17m 54s
release-tests-windows	26m 50s
slasher-tests	5m 26s
state-transition-vectors-ubuntu	11m 41s
syncing-simulator-ubuntu	22m 24s
target-branch-check	1s
test-suite-success	3s
	6h 2m 35s

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